DTH drilling is an important method for deep foundations. Driven by hydraulic power, the hammer at the bottom of the drill rod helps remove rock debris by adding compressed air.

Top hammer drilling is a low-speed drilling method that is suitable for small drilling projects in soft rocks and gravel, and shallow hole drilling.
Compared to top hammer drilling, DTH drilling boasts higher drilling speed and deeper drilling depth. It is suitable for drilling holes in hard rocks, such as granites and basalts. With higher drilling efficiency, it is applicable to large projects.

Rotary drilling rig uses large torque and rotation to rapidly bore through the rock. However, it has lower efficiency. This drilling method is applicable to soft and medium hard rocks, with the borehole diameter smaller than that of DTH drilling.

DTH drilling is powered by a hydraulic machine and the energy is transmitted from the drill rod to the drill bit to bore through the rock. Rock debris is evacuated by compressed air. This drilling method can drill straight holes with larger diameter. Being highly efficient, the DTH drilling method is suitable for soft, medium hard and hard rock drilling.

DTH drilling can drill holes with larger standard diameters ranging from 90 to 300 mm. Besides, it enjoys the following advantages:

-adaptable to various rocks.
-efficient to bore through hard rocks.
-drilling straight.
We provide customization services to meet various drilling needs.